Telemecanique LC2D12G7 Contactor 120V 12A LC1D12G7 Schneider Electric

This was a great solution for a decades-old reversing contactor that had started malfunctioning in a high-precision Hardinge lathe that I needed to repair. Just like the original contactor pair, this one has a mechanical interlock that prevents one contactor from closing if the other one is energized. An added bonus, which I didn't discover until I received the new unit, was that Schneider had already installed 4 pairs of molded/insulated jumpers. Two implement the normal 3 pairs of power connections for 3-phase reversing; and the other 2 interconnect the control circuits, to utilize the normally-closed auxiliary contact on one relay's coil to electrically disconnect and prevent the coil of the other relay from energizing. Thus, the new installation now has both an electrical and mechanical lock-out for added safety! All I had to do was lengthen a few too-short wires to make the connections that were in different locations on the new contactor. The preinstalled molded insulators also eliminated some of the wiring clutter around the new contactor installation. The only extra work I had was to fabricate the mount for the new contactor. The contactor had been screwed directly to the inside of the enclosed electrical box. The new one mounts on a standard 34mm DIN rail. Fortunately, I already had a piece of that, so after making an adapter plate that matched the hole pattern of the old relay mounting plate and installing a short length of 34mm DIN rail to that, the mechanical installation went smoothly. This contactor pair was also physically smaller than the old one, so there was plenty of room to screw everything together.